If a slime rat is part of a rat king and gets infected with oredeclinatio only that one will change if the conditions are met, so these 8 rats all had to get oredeclinatio on their own. When in a king formation they are very good at taking others down thanks to their bites. Do to their tails being being together like this they are mostly together for life, despite this they seem to be happy with this and if on the 1% chance only one from the rat king is left their is a 50% chance it will try to become part of another rat king.